Drill-support.



B. F. WILLIAMS & J. W. MAYFIELD.

DRILL SUPPORT.

APPLICATION FILED JAN. I4. 1915.

Patented Nov. 23, 1915.

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secured between the side walls and adjacent BENJMAN r. wrrnmius AND JAMES W.'I1/IA'YFIELD, srrorrnann, Texas.

cnnrLn-surronr.

Specification of Letters Zatent.

Application filed January 14, 1915. Serial No. 2,210. v

To all whom it may cancer 2a.

Be it known that we, BIiNJuaN F. WIL- LIAMS and JAMES W. fl/IAYFIELD, citizens of the United States, residing at Blufldale, in the county of Erath and State of Texas, have inventedcertain new and useful lmprovements in Drill-Supports, of which the following is a specification.

This invention relates to drilling apparatus, and more particularly to an apparatus of this character for use in coal or other mines forboring or drilling holes for blast ing charges and other purposes.

An object of the invention is to provide an improved post oh'frame having recesses cut in either side thereof so that the drillcarrying boxing can be operated from either side of the post or frame.

Another object is to provide the frame with detachable jackscrew boxings so that in the event of breakage of th'e screw or boxing the same may be replaced with a minimum time and labor.

A further object is to provide an improved boxing for the thread bar of the drill.

With these and other objects in View the invention consists in the novel features of construction, combination and arrangement of parts as will be hereinafter more fully described, illustrated in the accompanying drawing and claimed.

In the drawings: Figure 1 is a front elevation of the improved drill frame. Fig. 2 is a vertical sectional view. Fig. 3 is a detail perspective view ofthe thread-bar boxin Fig. l is a perspective view. of the drill, and Fig. 5 is a detail sectional view showing the means for holding one of the jack screw castings to the frame.

Referring to the drawings by numerals,

we have shown a flat piece of material bent to form a substantially rectangularly shaped frame having side walls 2 and upper and lower curved walls 3 and f, respectively. Intermediate brace members 5 and 6 being the upper and lower walls of the frame by means of bolts 7. The outer edges of either side of the frames are provided with recesses 8 which are alined with respect to the adja cent edges ofthe frame and arestaggered with respect to each other.

Substantially frusto conically shaped castings 9 and 10 are supported by the respective upper and lower walls of the frame and the intermediate members '5 and 6, the

upper casting 9 having a central bore in Patented Nov. 28, 1915.

which is slidably mounted a pivot, member 10. Means for allowing frictional adjust? ment of the .member 10 includes a thumb screw 12, the threaded portion of which eX- tends through the support 13, the latter being rigidly secured between the upper wall member of the casingand the respective brace member. The thumb screw 12 further extends through an opening in the side of the casting 9 whereby manipulation thereof will'cause frictional engagement between the member 10 and the inner walls of the casting 9 in order that the said member may be held rigid at'different adjusted positions.

The lower casting 10 is positioned within the frame in a manner substantially the sameas the upper casting and is held secure to the same through the medium of a washer l i. A'pair of slit arms 15 for engagement with the recesses formed in the sides of the casting 10 are carried upon the washer 14, which in COIljill'lC'tlOIl with a pin 16 prevents the accidental displacement of the casting during the operation of my device. The pin 16 passes through alined openings in the lower wall a, washer ll and brace member 6, its upper end terminating into, a bent por- 7 From the foregoing disclosure it is appar-- out that through the manipulation of the members 10 and 17 the frame portion of the device can be adjusted to conform with certain conditions during the use thereof.

A boxing for the thread bar 19 of the drill 19 is provided which comprises a pair f hinged upper and lower members 20 and 21, respectively, the respective members having lugs formed on oneface thereof and hav ing a pin passed therethrough for hingedly connecting the same, the said members being held in a closed engaging position upon the bar 19 by means of a latch 22 which is pivoted to a lug 23, formed on the lower member 21, and which is adapted to engage a lug 2e Trunnions 25 being formed on the lug 23 and on one of the hinged lugs in order to support the boxing in any of the alined re-- cesses 8.

formed upon the upper member 20.

From the foregoing description taken in connection With-the accompanying drawings, it is thought that the construction and operation of the device Will be clearlyunderstood, and while we have herein shown and described one speclfic form'of our 1nventlon, We do not W1sh to be lnnlted there-* to except for such limitations as the claims may import.

'VVe claim; a

1. A drill post including a rectangular frame, brace members fixed Within said framejand'spa'ced from the upper and lower ends thereof, the ends'of'said frame provided with openings,jsaid brace members provided with smaller openings, in coaxial alinement with the aforesaid openings, conical shaped castings with their conical porti'ons' seated in said openings, the inclined faces ofsaid conical castings bearing against boththe end portionsof said frame and against saidbrace members.

I cal' shaped castings with their conical por- EZKA drill post including a rectangular frame and spaced from the upper and lower ends thereof, the ends of said frame provided with openings, said brace members provided with smaller openings in coaxial alinement with theaforesaid openings, coniframe and spaced adjacent the respective upper and lower ends thereof, a casting extendlng through the upper end of sa d frame and the upper one ofsaid brace mem-..

bers, a'member adjustable in s'aidcasting, a member fixed between the upper end of said frame and the upper endof said brace members and an adjustable member extending through said fixed member and projectingv into said casting for retaining saidfirst mentioned adjustable member, for the purpose specified.

I In testimony whereof we a'ffix our signa'.

tures'in presence of'two witnesses.

BENJMAN- F. WILLIAMS. JAMESW. MAYFIELD; \Vitnesses:

J; Gil-1013mm, J W VVALLACE.

C'opiesbf thisp'atent may' be obtained for fire cents each, by addressing the Commissioner oflatnt f 1 Washington, D. G. 

